The Flavour Thesaurus by Niki Segnit is my new favourite book.
I bought it back in the summer and I've had it on my bedside table for the last few months. It is very much a reference book, although the prose is so friendly, that I usually end up reading a few pages further than intended.
It's a useful book to have to hand, on evenings when you can't quite think what to do with the ingredients you have in the house (hello, pea & rosemary soup).
This was also the case when I realised that I'd got the MacTweets 14 deadline wrong by -5 days. Two days before the actual deadline. Putting it another way, one hour after the shops had all closed for Christmas.